The vivo Y91i runs on Android 8.1 (Oreo) and is powered by Octa-core processor with 2GB RAM. It has a 6.22-inch, 720 x 1520 pixel display. The vivo Y91i also comes with a 13.0 + 2.0-megapixel camera that is able to record videos at 1080p. It comes with 16GB of built-in storage, and is able to support microSD cards of up to 256GB.